Dinosaur Stampede National Monument at Lark Quarry Conservation Park (also known just as Lark Quarry or Dinosaur Stampede) in Queensland, Australia is considered to be the site of the world's only known record of a dinosaur stampede, with fossilised footprints are interpreted as a predator stalking and causing a stampede of around 150 two-legged dinosaurs. This interpretation has been challenged in recent years, with evidence suggesting it may have been a natural river crossing. The fossils date to either the Albian or Turonian periods between 104 to 92 million years ago, and are part of the Winton Formation sandstone. In 2015, Winton Shire Council invited the Australian Age of Dinosaurs Museum of Natural History to take over the operation of public guided tours at Dinosaur Stampede National Monument. This joint initiative, implemented in April 2016, provides visitors with a broader understanding of unique Australian dinosaurs and the world they inhabited. In 2018, Dinosaur Stampede National Monument received 14,180 visitors. The Lark Quarry site is about south-west of the western Queensland town of Winton. Origin The traditional account is that 104 to 92 million years ago, a group of perhaps 180 chicken-sized coelurosaurs and Bantam to emu-sized ornithopods were disturbed by the arrival of a single much larger theropod, perhaps Australovenator or a related form, which may have been up to 6 metres long with 50-centimetre feet. The two smaller track types are placed within their own ichnotaxa Skartopus (small coelurosaurs) and Wintonopus (ornithopods), while the larger tracks were referred to cf. Tyrannosauropus and originally interpreted as a large theropod. The Skartopus and Wintonopus trackmakers were thought to have stampeded past the cf. Tyrannosauropus trackmaker (that walked in the opposite direction), leaving thousands of footprints in lake sediment. However, in 1994 the ichnotaxon Tyrannosauropus were identified as large plant-eater dinosaur tracks, and when combined with analyses to distinguish three-toed carnivore and herbivore dinosaur footprints the large tracks attributed to Tyrannosauropus at Lark Quarry were interpreted as being produced by a large herbivore similar to Muttaburrasaurus, rather than by a predatory theropod, and were suggested to belong to the ichnogenus Amblydactylus instead. Research by Anthony Romilio and colleagues casts doubt on the original interpretation. Analysis of the sediments indicates that they were deposited by a seasonal water course with water flowing at different depths and speeds at different times. The footprints were most likely made over a period of time, perhaps several